The distance to the stars is often explained by how long it takes light to travel to us from them. That works in the other direction, too. Today's xkcd panel gives us another way to visualize those distances by showing how old our pop culture references and memes are by the time they reach those stars. You can enlarge the image at xkcd by clicking if you can't read this small print. Link -via Tastefully Offensive
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I wonder which star system is now getting "Oh the Humanity!"
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